What will be printed as the result of the program?
#include <iostream>
#include <string>

struct A {
  const std::string &a;
  A(const std::string &b) : a(b) {}

int main() {
  A a("test");
  std::cout << a.a;
The result is undefined because the A::a reference will point to a temporary variable created in line 2 and deleted there. Therefore, the result of the program is not defined after this line. An execution error may or may not occur in line 3, since undefined behaviour

What is line 2 and 3? They are in a main() function?

2020 Aug 6, 9:16:45 AM

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